Blink, remove compiler errors

Dependents:   STM32F031_Blink_Aug17

Fork of mbed-STM32F030F4 by Nothing Special

Revision:
8:edb6e2a469d0
Parent:
0:38ccae254a29
--- a/common/Timer.cpp	Wed Nov 19 16:28:35 2014 +0000
+++ b/common/Timer.cpp	Mon Aug 10 23:44:25 2015 +0000
@@ -23,8 +23,10 @@
 }
 
 void Timer::start() {
-    _start = us_ticker_read();
-    _running = 1;
+    if (!_running) {
+        _start = us_ticker_read();
+        _running = 1;
+    }
 }
 
 void Timer::stop() {